1201121121005 has 16 divisors (see below), whose sum is σ = 1619705808000. Its totient is φ = 848417325888.

The previous prime is 1201121120951. The next prime is 1201121121029. The reversal of 1201121121005 is 5001211211021.

It is a cyclic number.

It is not a de Polignac number, because 1201121121005 - 2¹⁰ = 1201121119981 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 401711255 + ... + 401714244.

It is an arithmetic number, because the mean of its divisors is an integer number (101231613000).

Almost surely, 2^{1201121121005} is an apocalyptic number.

It is an amenable number.

1201121121005 is a deficient number, since it is larger than the sum of its proper divisors (418584686995).

1201121121005 is a wasteful number, since it uses less digits than its factorization.

1201121121005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803425540.

The product of its (nonzero) digits is 40, while the sum is 17.

Adding to 1201121121005 its reverse (5001211211021), we get a palindrome (6202332332026).

The spelling of 1201121121005 in words is "one trillion, two hundred one billion, one hundred twenty-one million, one hundred twenty-one thousand, five".